Each person on a team brings a unique perspective to the process; i.e., how things work; what happens when changes are made, and how to sustain improvements during daily work. Contributions are made from each individual's skill set and the team's synthesis of ideas.
Division of labor is the economic term for the practice of assigning small parts of a complicated job to individual workers who specialize in doing just their small part.
In those days conversation was still cultivated as an art; a neat repartee was more highly valued than the crackling of thorns under a pot; and the epigram, not yet a mechanical appliance by which the dull may achieve a semblance of wit, gave sprightliness to the small talk of the urbane.